Thirty participants with Parkinson's disease will be recruited from Central Indiana. All potential participants will be screened to determine eligibility for the study. Participants who are eligible and give consent will be randomly assigned to participate in either the non-contact boxing training or the traditional therapeutic exercise program for 36 sessions lasting over 12 weeks with 60-90 minutes of exercise each session. Participants will be measured immediately before (pre-test) and after (post-test) the intervention period.